categorical_split_info.hpp

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#ifndef MLPACK_METHODS_HOEFFDING_TREES_CATEGORICAL_SPLIT_INFO_HPP
#define MLPACK_METHODS_HOEFFDING_TREES_CATEGORICAL_SPLIT_INFO_HPP

#include <mlpack/prereqs.hpp>

namespace mlpack {
namespace tree {

class CategoricalSplitInfo
{
 public:
  CategoricalSplitInfo(const size_t /* categories */) { }

  template<typename eT>
  static size_t CalculateDirection(const eT& value)
  {
    // We have a child for each categorical value, and value should be in the
    // range [0, categories).
    return size_t(value);
  }

  template<typename Archive>
  void serialize(Archive& /* ar */, const unsigned int /* version */) { }
};

} // namespace tree
} // namespace mlpack

#endif